2.3. Boundary Layer Thickness

Try these first

1. 1.

   What does the no-slip condition state?

   Hint

   Think about fluid behavior near stationary surfaces.

2. 2.

   Define boundary layer.

   Hint

   Consider what happens directly adjacent to a solid surface.

3. 3.

   What is the primary characteristic of the no-slip boundary condition?

   • A. Fluid particles move faster than the surface velocity
   • B. Fluid velocity at the boundary is zero for stationary surfaces
   • C. Fluid velocity varies uniformly across the layer

   Hint

   Think about what happens right at the surface.

4. 4.

   True or False: The Reynolds number indicates whether the flow is laminar or turbulent.

   • True
   • False

   Hint

   Consider how it relates to flow stability.

5. 5.

   A fluid flows with a velocity of 4 m/s over a flat plate of length 2 m. Calculate the Reynolds number at the leading edge assuming a kinematic viscosity of 0.002 m²/s.

   Hint

   Consider that at the leading edge, x is zero.

6. 6.

   Discuss how variations in temperature can affect the viscosity of a fluid and subsequently the Reynolds number.

   Hint

   Think about how heating affects fluid flows.